Adhesion promoter compositions to eliminate substrate preparation and methods for the same

Abstract

An adhesion promoter composition is disclosed. The adhesion promoter composition also includes one or more reactive silanes which includes a mercaptopropyltrimethoxysilane, a glycidoxypropyltrimethoxysilane, or combinations thereof. The adhesion promoter composition also includes one or more reactive organometallics. The composition may include one or more organic solvents, an optional one or more gelling agents, and an optional one or more functional additives. A method for applying the adhesion promoter composition is disclosed, including contacting the one or more organic solvents, the one or more reactive silanes, the one or more reactive organometallics, the optional one or more gelling agents, and the one or more functional additives with one another to prepare the adhesion promoter composition, homogenizing the adhesion promoter composition, applying the adhesion promoter composition to a substrate, evaporating the organic solvents from the adhesion promoter composition, and applying a resin or paint layer over the adhesion promoter composition.

What is claimed is: 
     
       1. An adhesion promoter composition, comprising:
 a reactive mixture consisting of a mercaptopropyltrimethoxysilane and a glycidoxypropyltrimethoxysilane and one or more reactive organometallics; 
 one or more organic solvents; optionally, one or more gelling agents; and optionally, one or more functional additives; and 
 wherein the adhesion promoter composition comprises no aminoalkoxysilane; 
 wherein the mercaptopropyltrimethoxysilane is present in an amount of 0.75% by total weight of the adhesion promoter composition; and 
 wherein the glycidoxypropyltrimethoxysilane is present in an amount of about 3.5% by total weight of the adhesion promoter composition. 
 
     
     
       2. The adhesion promoter composition of  claim 1 , wherein the adhesion promoter composition comprises one or more gelling agents. 
     
     
       3. The adhesion promoter composition of  claim 2 , wherein the adhesion promoter composition has a viscosity of 0.001 to about 2000 Pa·s at a shear rate of about 0.1 to about 100 sec −1  at a temperature of about 25° C. 
     
     
       4. The adhesion promoter composition of  claim 2 , wherein the one or more gelling agents comprise one or more acrylate monomers selected from the group consisting of a polybutadiene dimethacrylate, a pentaerythritol tetraacrylate, a polyethylene glycol diacrylate, and combinations thereof. 
     
     
       5. The adhesion promoter composition of  claim 4 , wherein the one or more gelling agents comprise pentaerythritol tetraacrylate and polybutadiene dimethacrylate. 
     
     
       6. The adhesion promoter composition of  claim 1 , wherein the one or more reactive organometallics comprise a reactive titanate, a reactive zirconate, a reactive aluminate, or combinations thereof. 
     
     
       7. The adhesion promoter composition of  claim 6 , wherein the one or more reactive organometallics comprise a reactive titanate. 
     
     
       8. The adhesion promoter composition of  claim 1 , wherein the one or more organic solvents comprise an aliphatic hydrocarbon, an aromatic compound, a ketone, an amine, an ester, an alcohol, an aldehyde, an ether, or combinations thereof. 
     
     
       9. The adhesion promoter composition of  claim 8 , wherein the one or more organic solvents comprise the ketone. 
     
     
       10. The adhesion promoter composition of  claim 9 , wherein the ketone comprises acetone, methyl ethyl ketone (MEK), diethyl ketone, methyl propyl ketone (MPK), dipropyl ketone, methyl isobutyl ketone (MIBK), cyclopentanone, cyclohexanone, methyl amyl ketone, n-methyl-2-pyrrolidone, diisobutyl ketone, acetophenone, or combinations thereof. 
     
     
       11. The adhesion promoter composition of  claim 10 , wherein the ketone comprises methyl ethyl ketone (MEK), methyl propyl ketone (MPK), methyl isobutyl ketone (MIBK), acetone, or combinations thereof. 
     
     
       12. The adhesion promoter composition of  claim 1 , wherein the adhesion promoter composition comprises no gelling agent and the adhesion promoter composition has a viscosity of about 0.001 to about 50 Pa·s at a shear rate of about 0.1 to about 100 sec −1  at a temperature of about 25° C. 
     
     
       13. An adhesion promoter composition, comprising a reactive silane mixture consisting of mercaptopropyltrimethoxysilane, a glycidoxypropyltrimethoxysilane, and a reactive titanate complex; one or more organic solvents comprising a ketone; and optionally, one or more acrylate gelling agents; and
 wherein the adhesion promoter composition comprises no aminoalkoxysilane; 
 wherein the mercaptopropyltrimethoxysilane is present in an amount of about 0.75% by total weight of the adhesion promoter composition; and 
 wherein the glycidoxypropyltrimethoxysilane is present in an amount of about 3.5% by total weight of the adhesion promoter composition. 
 
     
     
       14. The adhesion promoter composition of  claim 13 , wherein the one or more acrylate gelling agents is selected from the group consisting of a polybutadiene dimethacrylate, a pentaerythritol tetraacrylate, a polyethylene glycol diacrylate, and combinations thereof. 
     
     
       15. The adhesion promoter composition of  claim 14 , wherein the one or more gelling agents comprise pentaerythritol tetraacrylate and polybutadiene dimethacrylate. 
     
     
       16. The adhesion promoter composition of  claim 13 , wherein the adhesion promoter composition has a viscosity of 0.001 to about 2000 Pa·s at a shear rate of about 0.1 to about 100 sec −1  at a temperature of about 25° C. 
     
     
       17. The adhesion promoter composition of  claim 13 , further comprising a reactive zirconate. 
     
     
       18. The adhesion promoter composition of  claim 13 , further comprising a reactive aluminate. 
     
     
       19. The adhesion promoter composition of  claim 13 , wherein the ketone comprises acetone, methyl ethyl ketone (MEK), diethyl ketone, methyl propyl ketone (MPK), dipropyl ketone, methyl isobutyl ketone (MIBK), cyclopentanone, cyclohexanone, methyl amyl ketone, n-methyl-2-pyrrolidone, diisobutyl ketone, acetophenone, or combinations thereof. 
     
     
       20. The adhesion promoter composition of  claim 13 , wherein the one or more organic solvents further comprise an aliphatic hydrocarbon, an aromatic compound, an amine, an ester, an alcohol, an aldehyde, an ether, or combinations thereof.